通过深层光学约束探讨中子星-黑洞混合物中的质量间隙
高能天体物理现象
2026-04-20 v1 广义相对论与量子宇宙学
摘要
引力波事件 S250206dm 作为第一个可能位于质量间隙内的中子星碰撞候选事件，提供了探索该系统电磁信号的独特机会。本文报告了以新建 2.5 米 Wide Field Survey Telescope (WFST) 为基础的深层多波段搜索，覆盖约 64% 的局化区域，5-sigma 限值亮度为 23 幺。共鉴定出 12 个潜在候选对象，但均不太可能与 S250206dm 有关。该非探测为该事件关联的克尔诺维拉提供了目前最严格的约束。关键的是，WFST 观测 alone 可排除一个相当于 269 Mpc 处的类似 AT 2017gfo 的事件。基于喷出物质量限制，质量比 Q >= 3.2 的中子星-黑洞组合受到否定。该光学推导的质量比约束首次达到了与引力信号推断相当的精度。这项工作目前为此类事件提供了最佳观测，并展示了快速、深层跟踪观测在约束致密二进制祖先属性方面的潜力，为探索质量间隙的构成提供了关键洞见。
引用
@article{arxiv.2602.17267,
title = {Illuminating the Mass Gap Through Deep Optical Constraint on a Neutron Star Merger Candidate S250206dm},
author = {Zhengyan Liu and Zelin Xu and Ji-an Jiang and Wen Zhao and Zhiping Jin and Zigao Dai and Dezheng Meng and Xuefeng Wu and Daming Wei and Runduo Liang and Lei He and Minxuan Cai and Lulu Fan and Weiyu Wu and Junhan Zhao and Ziqing Jia and Kexin Yu and Jinjun Geng and Di Xiao and Feng Li and Jinlong Tang and Yingxi Zuo and Xiaoling Zhang and Hao Liu and Jian Wang and Hongfei Zhang and Ming Liang and Hairen Wang and Dazhi Yao and Lei Hu and Xu Kong and Bin Li and Ning Jiang and Tinggui Wang and Zhen Wan and Yongquan Xue and Qingfeng Zhu and Xianzhong Zheng},
journal= {arXiv preprint arXiv:2602.17267},
year = {2026}
}
备注
20 pages, 10 figures, 6 tables, accepted by ApJL